after downloading the program to the 8051 based microcontroller,we used to lock the ic with the help of the programmer sofrware.is it possible for anyone to break this code and read the hex file from the ic?.
It should not be possible to do that, not by "normal" means, anyway.
Once the code protection bits have been programmed, the user has no way of reading out the contents of the on-chip program memory.
It depends on how bad the attacker wants to read the chip. I have seen some research slides whrere the attecker dissoslves the plastic chip package with an acid that dissolves the package but does no harm to the silicone chip. Then the chips memory is covered with UV resitant material and the protection fuse left uncovered. When exposed to UV light the protection fuse is cleared.
hai
i think that it's bad to break the code of the program of someone else.but we should be aware of the technique they are using to break.so that we can work out some alternative solutions to protest our program
hai
i think that it's bad to break the code of the program of someone else.but we should be aware of the technique they are using to break.so that we can work out some alternative solutions to protest our program